| Chemical Properties | colourless gas |
| Chemical Properties | Chlorodifluoromethane is a nonflammable,
colorless, nearly odorless gas. |
| Uses | Refrigerant, low-temperature solvent, fluorocarbon resins, especially tetrafluoroethylene polymers. |
| Uses | Aerosol propellant; refrigerant; lowtemperature
solvent |
| Definition | ChEBI: Chlorodifluoromethane is a hydrochlorofluorocarbon. |
| General Description | Difluorochloromethane is a colorless gas with an ethereal odor. Difluorochloromethane is shipped as a liquefied gas under its own vapor pressure. Difluorochloromethane is noncombustible. Difluorochloromethane can asphyxiate by the displacement of air. Contact with the liquid can cause frostbite. Toxic gases can be produced in fires involving Difluorochloromethane. Exposure of the container to prolonged heat or fire may cause Difluorochloromethane to rupture violently and rocket. |
| Air & Water Reactions | The liquefied gas poured into water can be violently explosive. This is due to the phase transition from superheated liquid to vapor. |
| Reactivity Profile | Difluorochloromethane is incompatible with the following: Alkalis, alkaline earth metals (e.g., powdered aluminum, sodium, potassium, zinc) . |
| Hazard | Asphyxiant. Central nervous system
impairment, cardiac sensitization. Questionable
carcinogen. |
| Health Hazard | Inhalation at greater than 10% concentration in air may cause narcosis. Liquid may cause frostbite. |
| Fire Hazard | Special Hazards of Combustion Products: Decomposition gases are toxic and irritating. |
| Safety Profile | Mddly toxic by
inhalation. Experimental reproductive
effects. Mutation data reported. An
asphpant in hgh concentrations. At
elevated pressures, 50% mixtures with air
are combustible although ignition is dfficult.
When heated to decomposition it emits
toxic fumes of Fand Cl-. See also
CHLORINATED HYDROCARBONS,
ALIPHATIC; and FLUORIDES. |
| Potential Exposure | Chlorodifluoromethane is used as an
aerosol propellant, refrigerant, and low-temperature solvent.
It is used in the synthesis of polytetrafluoroethylene
(PTFE). |
| Carcinogenicity | In one study, an oral dose of
300mg of HCFC 22/kg of body weight was given to
36 male and 36 female rats 5 days/week for 52 weeks.
The rats were held for 125 weeks compared to controls.
There was no evidence of any treatment related increase in
tumors. In an inhalation study 60 male and
60 female rats were exposed by inhalation to levels of
5000 ppm of HCFC 22. The exposures were 4 h/day,
5 days/week for 104 weeks (rats) or 78 weeks (mice). |
| Shipping | UN1018 Chlorodifluoromethane, Hazard Class:
2.2; Labels: 2.2-Non-flammable compressed gas. Cylinders
must be transported in a secure upright position, in a wellventilated truck. Protect cylinder and labels from physical
damage. The owner of the compressed gas cylinder is the
only entity allowed by federal law (49CFR) to transport
and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express
written permission of the owner.
|
| Incompatibilities | The liquefied gas poured into water can
be violently explosive. This is due to the phase transition
from superheated liquid to vapor. Chlorodifluoromethane reacts violently with alkalies and alkaline earth
metals; powdered aluminum; sodium, potassium, and zinc;
causing fire and explosion hazard. Moisture and rust cause
slow decomposition, forming toxic gases. Attacks some
plastics, rubber, and coatings. Decomposes in heat forming
fumes of chlorine, hydrogen chloride, HF, and phosgene.
Attacks magnesium and its alloys. |
| Waste Disposal | Return refillable compressed
gas cylinders to supplier. Return to vendor or send to
licensed waste disposal company. |
